Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens
In coastal waters, Antarctic rhodophytes are exposed to harsh environmental conditions throughout the year, like low water temperatures ranging from -1.8°C to 2°C and high light during the summer season. Photosynthetic performance under these conditions may be affected by slowed down enzymatic react...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.846919 2023-05-15T13:44:47+02:00 Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens Becker, Susanne Graeve, Martin Bischof, Kai LATITUDE: -62.237220 * LONGITUDE: -58.666390 * DATE/TIME START: 2008-01-26T00:00:00 * DATE/TIME END: 2008-02-17T00:00:00 2010-06-11 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.846919 https://doi.org/10.1594/PANGAEA.846919 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.846919 https://doi.org/10.1594/PANGAEA.846919 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Becker, Susanne; Graeve, Martin; Bischof, Kai (2010): Photosynthesis and lipid composition of the Antarctic endemic rhodophyte Palmaria decipiens: effects of changing light and temperature levels. Polar Biology, 33(7), 945-955, https://doi.org/10.1007/s00300-010-0772-5 Carlini_Base_C2 Carlini/Jubany Station Jubany Jubany_Station_C2 Potter Cove King George Island Antarctic Peninsula Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Research station RS SPP1158 Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.846919 https://doi.org/10.1007/s00300-010-0772-5 2023-01-20T07:33:28Z In coastal waters, Antarctic rhodophytes are exposed to harsh environmental conditions throughout the year, like low water temperatures ranging from -1.8°C to 2°C and high light during the summer season. Photosynthetic performance under these conditions may be affected by slowed down enzymatic reactions and the increased generation of reactive oxygen species. The consequence might be a chronic photoinhibition of photosynthetic primary reactions related to increased fragmentation of the D1 reaction centre protein in photosystem II. It is hypothesized that changes in lipid composition of biomembranes may represent an adaptive trait to maintain D1 turnover in response to temperature variation. The interactive effects of high light and low temperature were studied on an endemic Antarctic red alga, Palmaria decipiens, sampled from two shore levels, intertidal and subtidal, and exposed to mesocosm experiments using two levels of natural solar radiation and two different temperature regimes (2-5°C and 5-10°C). During the experimental period of 23 days, maximum quantum yield of photosynthesis decreased in all treatments, with the intertidal specimens exposed at 5-10°C being most affected. On the pigment level, a decreasing ratio of phycobiliproteins to chlorophyll a was found in all treatments. A pronounced decrease in D1 protein concentration occurred in subtidal specimens exposed at 2-5°C. Marked changes in lipid composition, i.e. the ratio of saturated to unsaturated fatty acids, indicated an effective response of specimens to temperature change. Results provide new insights into mechanisms of stress adaptation in this key species of shallow Antarctic benthic communities. Dataset Antarc* Antarctic Antarctic Peninsula Arctic King George Island Polar Biology Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Antarctic Peninsula Arctic King George Island Potter Cove ENVELOPE(-58.666390,-58.666390,-62.237220,-62.237220) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Carlini_Base_C2 Carlini/Jubany Station Jubany Jubany_Station_C2 Potter Cove King George Island Antarctic Peninsula Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Research station RS SPP1158 |
spellingShingle |
Carlini_Base_C2 Carlini/Jubany Station Jubany Jubany_Station_C2 Potter Cove King George Island Antarctic Peninsula Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Research station RS SPP1158 Becker, Susanne Graeve, Martin Bischof, Kai Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
topic_facet |
Carlini_Base_C2 Carlini/Jubany Station Jubany Jubany_Station_C2 Potter Cove King George Island Antarctic Peninsula Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas Research station RS SPP1158 |
description |
In coastal waters, Antarctic rhodophytes are exposed to harsh environmental conditions throughout the year, like low water temperatures ranging from -1.8°C to 2°C and high light during the summer season. Photosynthetic performance under these conditions may be affected by slowed down enzymatic reactions and the increased generation of reactive oxygen species. The consequence might be a chronic photoinhibition of photosynthetic primary reactions related to increased fragmentation of the D1 reaction centre protein in photosystem II. It is hypothesized that changes in lipid composition of biomembranes may represent an adaptive trait to maintain D1 turnover in response to temperature variation. The interactive effects of high light and low temperature were studied on an endemic Antarctic red alga, Palmaria decipiens, sampled from two shore levels, intertidal and subtidal, and exposed to mesocosm experiments using two levels of natural solar radiation and two different temperature regimes (2-5°C and 5-10°C). During the experimental period of 23 days, maximum quantum yield of photosynthesis decreased in all treatments, with the intertidal specimens exposed at 5-10°C being most affected. On the pigment level, a decreasing ratio of phycobiliproteins to chlorophyll a was found in all treatments. A pronounced decrease in D1 protein concentration occurred in subtidal specimens exposed at 2-5°C. Marked changes in lipid composition, i.e. the ratio of saturated to unsaturated fatty acids, indicated an effective response of specimens to temperature change. Results provide new insights into mechanisms of stress adaptation in this key species of shallow Antarctic benthic communities. |
format |
Dataset |
author |
Becker, Susanne Graeve, Martin Bischof, Kai |
author_facet |
Becker, Susanne Graeve, Martin Bischof, Kai |
author_sort |
Becker, Susanne |
title |
Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
title_short |
Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
title_full |
Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
title_fullStr |
Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
title_full_unstemmed |
Photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic Antarctic red alga, Palmaria decipiens |
title_sort |
photosynthetically active radiation during the experiment, and lipid content of sub- and intertidal specimens of the endemic antarctic red alga, palmaria decipiens |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.846919 https://doi.org/10.1594/PANGAEA.846919 |
op_coverage |
LATITUDE: -62.237220 * LONGITUDE: -58.666390 * DATE/TIME START: 2008-01-26T00:00:00 * DATE/TIME END: 2008-02-17T00:00:00 |
long_lat |
ENVELOPE(-58.666390,-58.666390,-62.237220,-62.237220) |
geographic |
Antarctic Antarctic Peninsula Arctic King George Island Potter Cove |
geographic_facet |
Antarctic Antarctic Peninsula Arctic King George Island Potter Cove |
genre |
Antarc* Antarctic Antarctic Peninsula Arctic King George Island Polar Biology Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Arctic King George Island Polar Biology Sea ice |
op_source |
Supplement to: Becker, Susanne; Graeve, Martin; Bischof, Kai (2010): Photosynthesis and lipid composition of the Antarctic endemic rhodophyte Palmaria decipiens: effects of changing light and temperature levels. Polar Biology, 33(7), 945-955, https://doi.org/10.1007/s00300-010-0772-5 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.846919 https://doi.org/10.1594/PANGAEA.846919 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.846919 https://doi.org/10.1007/s00300-010-0772-5 |
_version_ |
1766206229939486720 |